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发明名称
Screw holder and starter
摘要
申请公布号
US2532972(A)
申请公布日期
1950.12.05
申请号
US19470742429
申请日期
1947.04.18
申请人
VERTIN DONALD D
发明人
VERTIN DONALD D.
分类号
B25B23/10
主分类号
B25B23/10
代理机构
代理人
主权项
地址
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